Beneath the surface of Turkey lies Derinkuyu, an ancient underground city built to house 20,000 people. But why was it created, and who lived here? Join me as I explore its deep tunnels and uncover ...

But now, the discovery of an “underground city” in Abarkuh has caught many by surprise. Uncovered beneath five houses in ...

A city in China is known as 'The 8D City' due it's multi-layered construction, with trains rushing through buildings and the deepest underground system in the world ...

AN ANCIENT underground labyrinth city with its own advanced water system has been discovered after researchers stumbled across it in a garden. The sprawling network of twisting passages was found ...